James Shaw wrote:
Any etymologists on UHH? If so, do you know what the ligament-like strands are called, shown between the head and thorax, that allow the bee's head to bend away from its thorax?
Here's a diagram of insect morphology. Copyright of Piotr Jaworski and used with permission. As to the "joint" I would think it's some kind of chitinous joint. It is, after all, an exoskeleton. Maybe some one else can provide enlightenment.